Search results

Recently, deep reinforcement learning is developing rapidly and shows its power to solve difficult problems such as robotics and game of GO. Meanwhile, satellite attitude control systems are still using classical control technics such as proportional – integral – derivative and slide mode control as major solutions, facing problems with adaptability and automation.

In this paper, an approach based on deep reinforcement learning is proposed to increase adaptability and autonomy of satellite control system. It is a model-based algorithm which could find solutions with fewer episodes of learning than model-free algorithms.

Simulation experiment shows that when classical control crashed, this approach could find solution and reach the target with hundreds times of explorations and learning.

This approach is a non-gradient method using heuristic search to optimize policy to avoid local optima. Compared with classical control technics, this approach does not need prior knowledge of satellite or its orbit, has the ability to adapt different kinds of situations with data learning and has the ability to adapt different kinds of satellite and different tasks through transfer learning.

This paper aims to explore how the ownership transfer from a highly industrialised country to less industrialised countries influences consumers’ brand perceptions.

Three acquisition cases of premium car brands (Jaguar, Land Rover and Volvo) are investigated using qualitative data from online brand communities.

When country of ownership (COOW) for brands changes, it leads to different effects on consumers’ brand perception. Consumers are disoriented as to which cue to apply when evaluating the brand. They also see that brand values, and how these are communicated, are in conflict, as are sustainability images.

This paper focuses on the perspective of brand community members in Europe and the USA and studies only the car industry and acquisitions by two countries (China and India) using data from the time of ownership transfers. The authors discuss theoretical implications and suggest further research to gain more insights and address limitations.

Following a transfer of ownership, communication campaigns are required for addressing the original brand’s heritage and promoting the new brand owner’s image. Managers need to take advantage of loyal brand fans by turning them into brand ambassadors, spreading information to convince consumers that are more sceptical.

This study fills the knowledge gap regarding change of COOW to developing countries as new owners, and its consequences for consumer perception. The authors also introduce an innovative type of data collection through brand communities, which is less commonly used in international marketing research.

For high torque-density permanent magnet synchronous in-wheel motor, service life and electromagnetic performance are related directly to winding temperature. The purpose of this paper is to investigate the equivalent stator slot model to calculate the temperature of winding accurately.

This paper analyzes the the law of heat flux transfer in slot, which points the main influence factors of equivalent stator slot model. Thermal network model is used to investigate the drawbacks of conventional equivalent model. Based on the law of heat transfer in stator slot, a new layered winding model is put forward. According to winding type and property of impregnations, detailed method and equivalent principle of the new model are presented. The accuracy of this new method has been verified experimentally.

An accurate equivalent stator slot model should be built according to the low of heat transfer. According to theory analysis, the drawbacks of conventional equivalent stator slot model are pointed: it cannot reflect the temperature gradient of winding; the maximum and the average temperature of winding are much higher than actual value. For the new layered model, equivalent principle is related to winding type and property of impregnations, which makes the new model widely used.

This paper presents a new layered model, and shows detailed method, which is more meaningful for designers. The new layered model takes winding type and property of impregnations into account, which makes the new model widely used. It is verified experimentally that layered model is applicable to not only steady-state temperature field but also transient temperature field.

Numerous Chinese management studies have demonstrated significant differences between Chinese and Western management. This exploratory paper investigates the impact of Chinese culture and Western traditions on China's contemporary school leaders' views of leadership and management, particularly in the areas of relationship building, delegation, and promotion. Data were drawn from questionnaires completed by school leaders and individual interviews with principals from different parts of China. The findings indicate that the differences between Chinese and Western management practices in Chinese schools are not static and should not be over-stressed. To different extents, the respondent school leaders of China were affected by both Chinese and Western values and practices in school leadership and management. Specifically, they were more influenced by Chinese culture in the areas of school management and organization and by Western values and practices in the areas of relationship building, staff performance, and promotion. Their leadership and management preferences were also influenced by other factors, including gender, domestic politics, and development.